'Veil' in the Bible

Whenever the camp is about to move on, Aaron and his sons are to go in, take down the screening veil, and cover the ark of the testimony with it.

But you and your sons will carry out your priestly responsibilities for everything concerning the altar and for what is inside the veil, and you will do that work. I am giving you the work of the priesthood as a gift, but an unauthorized person who comes near the sanctuary will be put to death.”